It began in 1000 AD with the reading stone, a stone with a magnifying glass. But it was not until 1284 in Italy, that glasses were made to be worn. With time, these glasses became more popular, modern, thinner, lighter, and ready to wear on a regular basis with a plethora of frames. Thanks to physics in the 17th century, concave and convex lenses were utilized to make the right glasses. Nowadays it is these glasses that play an integral part of my life.
The invention of glasses first became important to me in 8th grade. It was a long day and I was sitting in my last class, physical science. The teacher wrote the equation of kinetic energy on the white board. I knew the formula because I read about it, but why were the numbers so fuzzy? The numbers haunted me, they hid their identity because the numbers were wearing a fur coat. I could not decipher a 4 from an 8, or a 5 from a 9. Panic hit me. I hoped this was just the outcome of an exhausting day. I asked my friend to read to me what my teacher wrote, upset that the numbers were playing a game with me. I walked home, hoping that this was just a one time deal. Unfortunately, the next day I had a similar experience. I knew it was time to talk to my parents, it was time to face the fact that there is a change in my sight. I must take charge of the whiteboard and tame the numbers. I want to see clearly.
After my classroom experience, it was time to find the right lens. I sat in the ophthalmology chair at Hinsdale, in the Wheaton Eye Clinic. My mother and brother were in the room with me when the ophthalmologist showed up. Sitting in the test chair, the lights were dim, and he (ophthalmologist) made me read the screen. I painfully squinted both my eyes to no avail, I could not clearly distinguish so many letters. After reading the letters, most likely wrong, my mother whispered into my ears “It’s time for glasses, don’t worry”. After receiving the script from the doctor, my mom took me to the frame section, in the front lobby, where I picked out 2 frames. My mom explained to me that I have her genes, and that glasses are inevitable. She admitted that some people even wear them as a fashion statement. I felt in control. I felt elated. I was determined not to let my change in sight stop me. I knew I would use my glasses when I needed them. I got into the habit of using the glasses in the classroom, even when I was close to the board. I practiced placing them back carefully into their hard case. I could not imagine how tough it must have been in the past for kids who struggled without having glasses. I wondered how their education might have been cut short.
Now how do glasses work though? In order for glasses to function, light hits the lens and the type of lens will determine how the light will bounce off the object. In my condition, I am nearsighted because I can see near; but, I can not see far as well. This condition, known as myopia, requires lenses that are curved inwards. This concave lens allows light to diverge so that I can see better at a distance. On the other hand,in farsightedness, known as hyperopia, the lenses must be convex or flare out in the middle. This allows for light to hit the lenses and converge onto a nearby object, so that vision is better closer. Glasses act like an extra lens in addition to the lens of our eyes. When light pierces the lens, it hits the back of the eye, the retina, stimulating the rods(black and white) and cones(color) to create the images in the brain. Later in life, the lens of the eyes become harder. This lack of flexibility forces people to wear reading glasses to bend light for the eyes.
The development of glasses evolves and continues to preserve vision. My nearsightedness is corrected with my glasses. It is this correction in vision that opens up the world, opens up opportunities, opens up the doors to sight. My eyes change and now I use my glasses to accommodate these changes-they are my new appendages. Thus, the invention of glasses have removed restrictions to my sight, broadened the horizon, and have given me a newfound sight-the renewal of sharp vision. Sight is priceless.